Abstract

The work descriptionbed in this paper was carried out at Fourah Bay College between December 1957 and March 1958. Attempts had been made to mark and recapture grasshoppers at intervals between October and December 1957, but late rains had made it difficult to catch them in any numbers. The last rain fell in midï¿½ December and towards the end of that month it was possible to begin regular catches. The data accumulated should make possible an estimate of changes in the population. However, this study is not likely to be complete for some time and the present paper therefore deals mainly with evidence of movement of females during maturation of the ovaries.